Introducer hub



FIG. 1 is a front perspective view of an introducer hub according to my design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof; and,

FIG. 7 is a side elevation view thereof.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for an introducer hub, as shown and described. 